Code Definition

B2305 — Seat Headrest Feedback Potentiometer Circuit Short to Ground

System: Body  |  Type: Generic (OBD-II Standard)  |  Make: Generic

About B2305

B2305 is a generic (obd-ii standard) body diagnostic trouble code. It belongs to the B-prefix family of codes, which covers body, interior, airbag, or comfort-electronics faults.

When B2305 is stored, the module has detected a short-circuit (voltage pulled to ground or to supply) in the monitored circuit.

Scanning & clearing: Body (B) codes are often stored in the body control module, airbag module, or climate module. A basic OBD-II tool usually will not read body codes — an enhanced or OEM-level scan tool is typically required.

Because B2305 is a generic OBD-II code, its base definition is shared across manufacturers. The specific diagnostic steps, reference values, and repair procedures can vary by vehicle, and the TaT Diagnostic Assistant includes verified procedures submitted by working technicians.

Code Information

The Seat Module or Body Control Module monitors the powered headrest position through a feedback potentiometer attached to the headrest adjustment mechanism. DTC B2305 specifically sets when the module detects that the headrest potentiometer signal voltage is pulled below the normal lower operating range and stuck at or near zero volts, indicating the signal wire is shorted to ground somewhere along its length. This narrows the diagnosis significantly because we know we are looking for a direct connection between the signal and chassis or sensor ground rather than an open or a high voltage sho...

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